Autovivification happens in an lvalue context, but you're using it only as an rvalue in the else branch of your accessors.

Update: And just to be (more :) pedantic, this isn't strictly speaking autovivification that you're expecting (that's automatically creating a reference to the proper data type when undef is used in an lvalue context). What you're seeing is access to a non-existent hash slot not creating an entry in that slot.

In reply to Re: Why is this not autovivifying? by Fletch
in thread Why is this not autovivifying? by blahblah

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